Vulkan: convert S8D24 <-> ABGR8

src/video_core/host_shaders/CMakeLists.txt

@@ -12,6 +12,7 @@ set(SHADER_FILES
     block_linear_unswizzle_3d.comp
     convert_abgr8_to_d24s8.frag
     convert_d24s8_to_abgr8.frag
+    convert_s8d24_to_abgr8.frag
     convert_depth_to_float.frag
     convert_float_to_depth.frag
     full_screen_triangle.vert

src/video_core/host_shaders/convert_s8d24_to_abgr8.frag

@@ -0,0 +1,23 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#version 450
+
+layout(binding = 0) uniform sampler2D depth_tex;
+layout(binding = 1) uniform isampler2D stencil_tex;
+
+layout(location = 0) out vec4 color;
+
+void main() {
+    ivec2 coord = ivec2(gl_FragCoord.xy);
+    uint depth = uint(textureLod(depth_tex, coord, 0).r * (exp2(24.0) - 1.0f));
+    uint stencil = uint(textureLod(stencil_tex, coord, 0).r);
+
+    highp uint depth_val =
+        uint(textureLod(depth_tex, coord, 0).r * (exp2(32.0) - 1.0));
+    lowp uint stencil_val = textureLod(stencil_tex, coord, 0).r;
+    highp uvec4 components =
+        uvec4((uvec3(depth_val) >> uvec3(24u, 16u, 8u)) & 0x000000FFu, stencil_val);
+    color.rgba = vec4(components) / (exp2(8.0) - 1.0);
+}